Contact lens

Abstract

A contact lens (100) includes a lens body (1), an electronic component (2), and a circuit structure (3). The lens body (1) comprises an optical portion (11) and a wear ring (12) surrounding the optical portion (11). The wear ring (12) has a C-shaped design region (121) and a lower eyelid region (122) located between the ends of the design region (121). The electronic component (2) is integrated into the lower eyelid region (122). The circuit structure (3) is integrated into the wear ring (12). The wear ring (12) has several positioning grooves recessed into its surface toward the circuit structure (3), and the lower portion of each positioning groove contains a part of the circuit structure (3).The sum of the areas of the positioning slot openings is equal to or less than 1% of the sum of the surface areas of the lens body (1).

Description

Contact lens TECHNICAL SECTOR OF THE INVENTION The present invention relates to a contact lens and, more specifically, to a smart contact lens. PRIOR ART US Patent 2014 / 371560 A1 discloses a wearable device and describes methods for integrating a structure into a wearable device. The wearable device includes a transparent polymer and a structure integrated into the transparent polymer. The transparent polymer defines a back face and a front face of the wearable device. The structure has an outer diameter and an inner diameter and includes a sensor configured to detect an analyte and an antenna. The antenna includes a plurality of conductive loops spaced apart between the outer and inner diameters. Other embodiments of contact lenses are known from US Patents 2014 / 296672 A1, US 2015 / 188197 A1, US 2014 / 107444 A1 and US 2022 / 163819 A1. A conventional smart contact lens requires the incorporation of a circuit structure within it; however, it is difficult to accurately integrate the circuit structure into a specific position of the conventional smart contact lens, making it challenging to achieve a high level of conformity in the mass production of the conventional smart contact lens. CHARACTERISTICS OF THE INVENTION In response to the aforementioned technical deficiencies, the present invention discloses a contact lens for effectively improving the problems associated with conventional smart contact lenses according to independent claim 1, which defines the invention. The dependent claims disclose further embodiments of the independent claim. To solve the aforementioned problems, one of the technical aspects adopted in the present invention is to disclose a contact lens comprising a lens body, an electronic component, and a circuit structure. The lens body comprises an optical portion and an annular contact portion surrounding the optical portion. The annular contact portion has a C-shaped arrangement zone and a lower eyelid zone disposed between two ends of the arrangement zone. The lens body comprises a back surface and a front surface. The back surface has a predetermined curvature for placement on an eye. The front surface is disposed opposite the back surface. The electronic component is integrated into the lower eyelid zone of the annular contact portion. The circuit structure is integrated into the annular contact portion and is connected to the electronic component. A plurality of recessed positioning slots are cut from at least one of the front and one of the rear surfaces into the circuit structure, and the lower portion of each positioning slot includes a portion of the circuit structure, thereby exposing that portion to the external environment. Furthermore, the sum of the areas of the positioning slot openings is less than or equal to 1% of the sum of the front and rear surface areas. The contact annular portion has a maximum thickness located in an area of ​​the contact annular portion that corresponds in position with the electronic component, and a minimum thickness located in an area of ​​the arrangement zone away from the lower lid area.When the circuit structure and electronic component are arranged in a forming mold to create the lens body, positioning grooves are configured to allow the forming mold's positioning structures to abut against the circuit structure, thus positioning the circuit structure and electronic component in a predetermined position. The positioning grooves include a plurality of front positioning grooves recessed into the front surface.The depth of each of the front positioning grooves is within a range of 50 µm to 100 µm, and each of the front positioning grooves features: a first bottom surface including the portion of the circuit structure exposed to the external environment; a first raised surface connecting the front surface and the first bottom surface; a second bottom surface separated from the front surface by a distance greater than the distance between the first bottom surface and the front surface; and a second raised surface connecting the first bottom surface and the second bottom surface and disposed on one side of the circuit structure or on one side of the electronic component. Therefore, in the contact lens disclosed by the present invention, the annular contact portion is designed with positioning slots to facilitate high-precision positioning of the circuit structure and electronic component during the contact lens manufacturing process, enabling the contact lens to achieve high conformability in mass production. Specifically, the positioning slots can be controlled within a specific range, thus preventing any impact on the structural strength of the contact lens. Furthermore, the circuit structure portion is exposed beyond the corresponding positioning slot to enhance the heat dissipation efficiency of the circuit structure. These and other aspects of the present invention will be evident from the following description of the embodiment, taken in conjunction with the following drawings and their legends, although variations and modifications may be made to them without departing from the scope of the claims. BRIEF DESCRIPTION OF THE DRAWINGS The described achievements can be better understood by referring to the following description and the accompanying drawings, in which: Figure 1 is a schematic, perspective view of a contact lens according to a first embodiment of the present invention; Figure 2 is a schematic top view of Figure 1; Figure 3 is a schematic plan view showing the contact lens placed in the eye of a user, according to a first embodiment of the present invention; Figure 4 is a schematic cross-sectional view taken along line IV-IV of Figure 1; Figure 5 is a larger-scale schematic view of part V of Figure 4; Figure 6 is a schematic cross-sectional view taken along line VI-VI of Figure 1; Figure 7 is an enlarged schematic view of part VII of Figure 6; Figure 8 is a schematic cross-sectional view taken along line VIII-VIII of Figure 1; Figure 9 is an enlarged schematic view of part IX of Figure 8; Figure 10 is a schematic top view of the contact lens according to a second embodiment of the present invention; Figure 11 is a schematic cross-sectional view taken along line XI-XI of Figure 10; Figure 12 is a schematic perspective view of the contact lens according to a third embodiment of the present invention; Figure 13 is a schematic top view of Figure 12; Figure 14 is a schematic, cross-sectional view taken along line XIV-XIV of Figure 12; Figure 15 is a schematic, cross-sectional view taken along line XV-XV of Figure 12; and Figure 16 is an enlarged schematic view of part XVI of Figure 15. DETAILED DESCRIPTION OF THE EXAMPLES OF THE ACHIEVEMENTS The present invention is described in greater detail in the following examples, which are merely illustrative, since numerous modifications and variations thereon will be obvious to those skilled in the art. Equal numbers in the drawings indicate identical components in all views. As used herein and in all subsequent claims, unless the context clearly indicates otherwise, the terms "a," "an," and "the" have plural meanings, and "in" have both "in" and "on." For the reader's convenience, headings or subheadings may be used herein without affecting the scope of the present invention. The terms used herein have, in general, their usual meanings in the art. In case of conflict, this document, including any definitions provided herein, shall prevail. The same can be expressed in several ways. Alternative and synonymous terms may be used for any term or terms discussed herein, and no special significance should be attached to the fact that a term has been developed or discussed herein. The mention of one or more synonyms does not preclude the use of other synonyms. The use of examples anywhere in this specification, including examples of any terms, is for illustrative purposes only and in no way limits the scope or meaning of the present invention or of any term exemplified. Furthermore, the present invention is not limited to the various embodiments described herein.Numbering terms such as "first", "second", or "third" may be used to describe various components, signals, or the like, for the sole purpose of distinguishing one component / signal from another, and are not intended, nor should they be interpreted as imposing any substantial limitation on the components, signals, or the like. [First realization] Referring to Figures 1 to 9, a first embodiment of the present invention is provided. As shown in Figures 1 to 4, the present embodiment discloses a contact lens 100 that can be a smart contact lens. The contact lens 100 can be placed in one of the user's eyes 200 (as shown in Figure 3) or implanted in eye 300 (not shown in the drawings), according to the design requirements. Furthermore, the 100 contact lens in the present embodiment may have a corrective function for a refractive error that includes hyperopia, myopia, astigmatism, presbyopia or astigmatism-presbyopia; or the 100 contact lens may be a cosmetic lens without a corrective function. The contact lens 100 of the present embodiment includes a lens body 1, an electronic component 2 integrated into the lens body 1, and a circuit structure 3 integrated into the lens body 1 and electrically coupled to the electronic component 2; however, the present invention is not limited to this. For example, in other embodiments of the present invention not shown in the drawings, depending on the design requirements, the contact lens 100 may include only the lens body 1 and the circuit structure 3, and be supplied without the electronic component 2. The following description describes the structure and connection relationship of each component of the contact lens 100. In the present embodiment, the lens body 100 is formed by solidifying a hydrogel (e.g., p-HEMA) or a silicone hydrogel, although the present invention is not limited to this.The lens body 1 includes an optical part 11 and an annular contact part 12 surrounding the optical part 11. The optical part 11 may be formed with or without a refractive error correction function, depending on the design requirements. It should be noted that the optical part 11 of the present embodiment is provided without any integrated components, but the optical part 11 may also be formed to include at least one integrated component, depending on the design requirements (for example, when the contact lens 100 is applied to a digital zoom device), and is not limited by the description of the present embodiment. Furthermore, the optical part 11 defines a central axis L, and both the center of the optical part 11 and the center of the annular contact part 12 lie on the central axis L.The contact ring portion 12 is connected to an outer edge of the optical portion 11 and is substantially circular in shape. The electronic component 2 and circuit structure 3 are integrated into the contact ring portion 12. The production method for the electronic component 2 and circuit structure 3 integrated into the contact ring portion 12 (or the manufacturing process for the contact lens 100) may be adjusted or modified according to design requirements, but this description is not limited to it. Specifically, the contact ring portion 12 has a C-shaped arrangement zone 121 and a lower eyelid zone 122 located between two ends of the arrangement zone 121. The electronic component 2 is integrated into the lower eyelid zone 122 of the contact ring portion 12.When the contact lens 100 is placed in the eye 200, the lower eyelid area 122 and electronic component 2 are located within the lower eyelid 201 of the eye 200, which is less sensitive, effectively reducing the user's foreign body sensation (FBS). In other words, as shown in Figures 2 to 5, the lens body 1 (or its surfaces) includes (n) a back surface 1b and a front surface 1a that is disposed in front of the back surface 1b. The back surface 1b has a predetermined curvature that is only relevant to eye 200, so that it can be placed (or gently attached) to eye 200. Furthermore, the front surface 1a has a visible surface 11a that corresponds in position to the optical part 11 and a free curved surface 12a that corresponds in position to the annular contact part 12. The visible surface 11a has a first curvature relevant for an optical design that corrects refractive error; or, the first curvature of the visible surface 11a and the rear surface 1b can together form a diopter-free structure. Specifically, the first curvature of the visible surface 11a differs from a second curvature of the free curved surface 12a, and the thickness of the annular contact portion 12 gradually increases towards the electronic component 2 (or the lower eyelid area 122). However, the present invention is not limited to this. For example, in other embodiments of the present invention not shown in the drawings, the first curvature may be substantially the same as the second curvature, and the thickness of the annular contact portion 12 is substantially uniform. In other words, any position of the contact annular portion 12 of the contact lens 100 can be made to have at least one electronic component 2 integrated therein, according to the design requirements. For example, in other embodiments of the present invention not shown in the drawings, two opposite sides of the contact annular portion 12 in the horizontal direction of the eye 200 can be made to have at least one electronic component 2 integrated therein, such that the contact annular portion 12 has a maximum thickness in the horizontal direction and becomes gradually thinner in the vertical direction of the eye 200. Consequently, the above arrangement of the contact lens 100 can allow the contact lens 100 to receive at least two of the electronic components 2 and reduce the user's FBS. In summary, the contact lens 100 of the present embodiment is provided with a free curved surface 12a arranged on the front surface 1a of the lens body 1, such that the thickness of the arrangement zone 121 does not need to be based entirely on, or equal to, the thickness of the lower eyelid zone 122 in order to reduce the thickness of the arrangement zone 121. Consequently, the oxygen permeability of the arrangement zone 121 can be effectively increased and the FBS of the contact lens 100 can be reduced (or improved). To further increase the oxygen permeability of the arrangement zone 121 and further reduce the FBS of the contact lens 100, the contact lens 100 preferably has at least one of the technical features disclosed in the following paragraphs by adjusting the second curvature of the free curved surface 12a, but the present invention is not limited to this. The contact annular portion 12 (for example, a portion of the contact annular portion 12 corresponding to electronic component 2 and circuit structure 3) has a maximum thickness Tmax located in a portion of the contact annular portion 12 (for example, the lower eyelid area 122) that corresponds in position to electronic component 2, and also has a minimum thickness Tmin located in a portion of the disposition area 121 (for example, an upper portion of the disposition area 121 shown in Figure 4) away from the lower eyelid area 122. In other words, when contact lens 100 is placed in eye 200, the portion of the contact annular portion 12 of contact lens 100 with the maximum thickness Tmax is located within the lower eyelid 201 of eye 200, and the portion of the contact annular portion 12 of contact lens 100 with the minimum thickness Tmin is located within the upper eyelid 202 of the eye 200.The maximum thickness Tmax and the minimum thickness Tmin in the present embodiment correspond respectively in position to the lower eyelid 201 and the upper eyelid 202 of the user, but the relationship between the thickness of the contact lens 100 and the eyelids 201, 202 of the user in the present invention is not limited to this. Furthermore, the circuit structure 3 in the lower eyelid area 122 is separated from the rear surface 1b by a first distance D122, and the circuit structure 3 in the arrangement area 121 is separated from the rear surface 1b by a second distance D121 that is less than the first distance D122. The circuit structure 3 arranged in the lens body 1 can be used independently (not shown in the drawings) or can cooperate with the electronic component 2, so that the circuit structure 3 (and the electronic component) can be electrically or physically actuated to implement at least one of the functions including power reception, wireless signal transmission, digital calculation, detection and monitoring, pressure application, current release, image projection, optical zoom, and energy storage; however, the present invention is not limited to these.The circuit structure 3 in the present embodiment includes a support 31 and a circuit 32 (e.g., a metallic circuit) formed on the support 31. The circuit 32 is connected to the electronic component 2 so that both are electrically coupled to each other. In the present embodiment, the support 31 can be molded to form a predetermined curved structure by applying pressure from a mold at normal or elevated temperature, such that the support 31 has a fixed curvature that is different from the second curvature, and the fixed curvature is preferably close to the predetermined curvature of the back surface 1b (e.g., between 100% and 110% of the predetermined curvature), but the present invention is not limited to this. In the present embodiment, support 31 is a flexible printed circuit board (FPCB) with a thickness within the range of 10 µm to 300 µm. Furthermore, the thickness of support 31 is preferably within the range of 40 µm to 80 µm, and the polymeric materials of support 31 may include polyimide (PI), liquid crystal polymer (LCP), polyethylene terephthalate (PET), or poly(2,6-naphthalenedicarboxylate) (PEN), but the present invention is not limited to these. Specifically, support 31 has a C-shaped segment 311 integrated into the arrangement area 121 and a connection segment 312 integrated into the lower eyelid area 122. The connection segment 312 is connected between two distal ends of the C-shaped segment 311. Electronic component 2 can be assembled to the connection segment 312, and circuit 32 is formed in the C-shaped segment 311 and extends to the connection segment 312 to electrically couple to electronic component 2. Furthermore, since the carrier 31 is easily wrinkled or experiences stress concentrations during pressing and forming, the C-shaped segment 311 has at least one through-hole 3111 that is completely filled with the lens body 1. It should be noted that in a top view of the contact lens 100 along the central axis L (or perpendicular to it), the area of ​​the at least one through-hole 3111 is from 1% to 85% (e.g., preferably from 10% to 40%) of the area enclosed by the outer contour of the C-shaped segment 311. This effectively reduces wrinkling or stress concentration in the carrier 31 and further increases the oxygen permeability of the contact lens 100 by cooperating with the free curved surface 12a. Furthermore, the support 31 may have a plurality of radial notches 313 recessed from an outer edge thereof towards the central axis L, thereby further reducing wrinkling or stress concentration in the support 31. In the present embodiment, the radial notches 313 are formed respectively at the boundaries between the C-shaped segment 311 and the connecting segment 312, but the present invention is not limited to this. Furthermore, in the top view of contact lens 100, the area of ​​the at least one through-hole 3111 represents between 1% and 75% of the area of ​​the annular contact portion 12. Moreover, the number of at least one through-hole 3111 formed in the C-shaped segment 311 is greater than one in the present embodiment, although the present invention is not limited to this. For example, in other embodiments of the present invention not shown in the drawings, the C-shaped segment 311 of the holder 31 can be formed without any through-hole 3111. In the present embodiment, circuit 32 has at least one closed loop, and the through holes 3111 of the C-shaped segment 311 are arranged in at least one closed loop of circuit 32. It should be noted that in the present embodiment the number of at least one closed loop is greater than one, and the through holes 3111 are arranged respectively in the closed loops of circuit 32, but the present invention is not limited to this. Each of the through holes 3111 is curved and has a width that gradually increases from its two ends towards its center (for example, the through hole 3111 in the present embodiment is substantially crescent-shaped). Specifically, each of the through holes 3111 has an inner rim 3112 and an outer rim 3113, and the two ends of the inner rim 3112 are respectively connected to the two ends of the outer rim 3113 to form the two ends of the through hole 3111. Either the inner edge 3112 and the outer edge 3113 are arched, the radius of the inner edge 3112 is less than the radius of the outer edge 3113, and the center of the inner edge 3112 and the center of the outer edge 3113 are located respectively in two different planes without curvature, perpendicular to the central axis L. In other words, each of the through holes 3111 in the present embodiment is arranged along the fixed curvature of the support 31 and is not located in a plane without curvature. To clearly describe the arrangement of the through-holes 3111, the following relationships are described according to the top view of contact lens 100. The central axis L defines an origin point, an X-axis, and a Y-axis that is perpendicular to the X-axis, and the X-axis and Y-axis intersect at the origin point. Contact lens 100 is sequentially divided into a first quadrant Q1, a second quadrant Q2, a third quadrant Q3, and a fourth quadrant Q4 in a counterclockwise direction with respect to the origin point. In the top view of contact lens 100, the lower eyelid zone 122 is arranged in the third quadrant Q3 and the fourth quadrant Q4, the Y-axis is substantially the centerline of the lower eyelid zone 122, and the central angle 122 of the lower eyelid zone 122, with respect to the origin point, is preferably within a range of 30 to 180 degrees. The central angle 122 can be modified according to design requirements and is not limited by the present embodiment. Furthermore, in the top view of contact lens 100, the through-holes 3111 are arranged in the first quadrant Q1, the second quadrant Q2, the third quadrant Q3, and the fourth quadrant Q4 (for example, four parts of the through-holes 3111 are arranged respectively in the first quadrant Q1, the second quadrant Q2, the third quadrant Q3, and the fourth quadrant Q4), and the area of ​​any one of the four parts of the through-holes 3111 is from 50% to 150% of the area of ​​another of the four parts of the through-holes 3111. Specifically, in the top view of contact lens 100, any one of the through holes 3111 is arranged across at least two quadrants (for example, any one of the through holes 3111 is arranged in the first quadrant Q1 and the fourth quadrant Q4, or is arranged in the second quadrant Q2 and the third quadrant Q3), and any one of the through holes 3111 can be mirror-symmetric with respect to the X-axis, but the present invention is not limited to that. The through-holes 3111 include at least one first through-hole 3111a and at least one second through-hole 3111b. Furthermore, in the present embodiment, the number of at least one through-hole 3111a and the number of at least one second through-hole 3111b may be greater than one, but the present invention is not limited to this. The first through-holes 3111a are located on the inner side of the second through-holes 3111b. In other words, the radius of each of the second through-holes 3111b is different from (for example, greater than) the radius of each of the first through-holes 3111a. In the present embodiment, each of the first through holes 3111a is arched with the center of the circle located on the central axis L, and the first through holes 3111a are spaced apart from each other. Each of the second through holes 3111b is arched with the center of the circle located on the central axis L, and the second through holes 3111b are spaced apart from each other. Furthermore, any one of the first through holes 3111a is located in a zone defined by a central angle of the corresponding second through hole 3111b, and a division between any two adjacent first through holes 3111a and a division between any two adjacent second through holes 3111b are not arranged in the same radial direction of the contact lens 100. As shown in Figures 2, 4, and 6, the annular contact portion 12 has a plurality of positioning slots 123 recessed from at least one of the front surface 1a and the rear surface 1b into the circuit structure 3, and the underside of each of the positioning slots 123 includes a portion of the circuit structure 3, thus allowing that portion of the circuit structure 3 to be exposed to the external environment. In other words, any contact lens that does not have the positioning slot is different from the contact lens 100 of the present embodiment.Specifically, when the circuit structure 3 and the electronic component 2 are arranged in a forming mold (not shown in the drawings), the positioning structures of the forming mold abut against the portion of the circuit structure 3 to precisely position the circuit structure 3 and the electronic component 2 in a predetermined position. A hydrogel or silicone hydrogel is then injected into the forming mold to encapsulate the circuit structure 3 and the electronic component 2, and it solidifies to form the lens body 1. After the contact lens 100 is removed from the forming mold, the portions of the lens body 1 that cover the positioning structures of the forming mold define the positioning grooves 123. In summary, in the contact lens 100 disclosed in the present embodiment, the annular contact part 12 is designed to have positioning slots 123 to facilitate high-precision positioning of the circuit structure 3 and the electronic component 2 in the manufacturing process of the contact lens 100, so that the contact lens 100 can have high conformity in mass production. Furthermore, the positioning slots 123 can be controlled within a specific range (e.g., the sum of the areas of the openings of the positioning slots 123 must be less than or equal to 1% of the sum of the area of ​​the front surface 1a and the area of ​​the back surface 1b), thus preventing the structural strength of the contact lens 100 from being affected. The part of the circuit structure 3 is exposed through the corresponding positioning slot 123 to increase the heat dissipation efficiency of the circuit structure 3. Specifically, as shown in Figures 4 to 9, the positioning slots 123 in the present embodiment include a plurality of front positioning slots 123a and a plurality of rear positioning slots 123b. The front positioning slots 123a are recessed from the front surface 1a (e.g., the free curved surface 12a) into the circuit structure 3, and the rear positioning slots 123b are recessed from the rear surface 1b into the circuit structure 3, but the present invention is not limited to this. Furthermore, the underside of each of the rear positioning slots 123b and / or the underside of each of the front positioning slots 123a can accommodate a portion of the circuit structure 3, thereby allowing said portion of the circuit structure 3 to be exposed to the external environment. In the present embodiment, the depth of each of the front positioning slots 123a is between 50 µm and 100 µm, and the depth of each of the rear positioning slots 123b is between 50 µm and 100 µm.In other words, the contact lens 100 of the present embodiment is obtained by designing the depths of the front positioning grooves 123a and the depths of the rear positioning grooves 123b such that the circuit structure 3 can be precisely integrated into the lens body 1 at a predetermined depth. Furthermore, the predetermined depth can be modified according to design requirements and is not limited by the present embodiment. In the present embodiment, the rear positioning slots 123b and any of the front positioning slots 123a do not correspond to the same part of the circuit structure 3, thus creating a multi-point positioning effect through the staggered arrangement. This facilitates high-precision positioning of the circuit structure 3 and effectively prevents any specific point of the contact lens 100 from having weak structural resistance. In the top view of the contact lens 100 of the present embodiment, the front positioning slot 123a and the rear positioning slot 123b can each extend along a radial direction of the lens body 1 and through the circuit structure 3, but the present invention is not limited to this. Specifically, the front positioning groove 124a in the present embodiment is substantially a stepped structure. The front positioning groove 123a has a first bottom surface 1231, a first raised surface 1232 connected between the front surface 1a (e.g., the free curved surface 12a) and the first bottom surface 1231, a second bottom surface 1233 separate from the first bottom surface 1231, and a second raised surface 1234 connected between the first bottom surface 1231 and the second bottom surface 1233. The first bottom surface 1231 is positioned on the underside of the first positioning slot 123a, and this first bottom surface 1231 includes the portion of the circuit structure 3 exposed to the external environment. The second bottom surface 1233 is separated from the front surface 1a (e.g., the free curved surface 12a) by a distance greater than the distance between the first bottom surface 1231 and the front surface 1a (e.g., the free curved surface 12a). Furthermore, the second raised surface 1234 is positioned to one side of the circuit structure 3 or to one side of the electronic component 2, and circuit 32 is fully integrated into the lens body 1. In other words, the circuit structure 3 can only be exposed from the positioning slots 123 through a portion of the support 31. It should be noted that the structure and shape of each of the front positioning slots 123a can be adjusted or changed according to design requirements, and the front positioning slots 123a in the present embodiment are formed into different structures (as shown in Figure 4 and Figure 8), thereby facilitating high-precision positioning of the circuit structure 3. Specifically, the depth of any of the front positioning slots 123a in the lower eyelid area 122 is greater than the depth of another of the front positioning slots 123a in the arrangement area 121. In addition, the lower side (or the first bottom 1231) of any of the front positioning slots 123a in the lower eyelid area 122 includes a portion of the electronic component 2 to allow the portion of the electronic component 2 to be exposed to the external environment, thereby facilitating high-precision positioning of the circuit structure 3. It is worth noting that the contact lens 100 of the present embodiment can also interact with any type of device. For example, in other embodiments of the present invention not shown in the drawings, the contact lens 100 can be wirelessly connected to any wearable device (e.g., a glasses-mounted reader or a neck-worn reader) worn by the user, and the wearable device (or the reader) can use a common wireless transmission technology (e.g., RFID technology in a bandwidth of 13, 56 MHz or 860-960 MHz) or other wireless technologies for transmitting power or signals by induction, in order to supply power, provide a sensing function, or provide signal feedback to the contact lens 100, thereby enabling applications such as intelligent monitoring (e.g.,Continuous collection of intraocular pressure readings and issuance of alerts), smart treatments (e.g., monitoring the prolonged release of a dry eye drug), augmented reality services (e.g., image projection), or other smart applications. [Second realization] Referring to Figures 10 and 11, a second embodiment of the present invention is provided, which is similar to the first embodiment. For the sake of brevity, descriptions of the same components in the first and second embodiments of the present invention are omitted, and the following description only discloses the features that differ between the first and second embodiments. In the present embodiment, at least one of the front positioning slots 123a may have a toothed shape formed through the through-holes 3111, such that a portion of each of the through-holes 3111 is exposed to the external environment. In the top view of the contact lens 100, the toothed front positioning slot 123a extends along the radial direction of the lens body 1 and through the circuit structure 3. Furthermore, the position of the portion of each of the through-holes 3111 corresponds to a position between the first bottom surface 1231 and the second bottom surface 1233 of the toothed front positioning slot 123a. Specifically, in the front positioning groove 123a which has the toothed shape, each of the first bottom surface 1231 and the second bottom surface 1233 includes a plurality of segments that are separated from each other, the first bottom surface 1231 includes the part of the circuit structure 3 to expose the part of the circuit structure 3, the distance between the second bottom surface 1233 and the front surface 1a is greater than the distance between the first bottom surface 1231 and the front surface 1a, and the first protruding surface 1232 is connected to the free curved surface 12a and the second bottom surface 1233. In summary, the annular contact part 12 of the contact lens 100 in the present embodiment is provided with the front positioning groove 123a which has a toothed shape and is formed through the through holes 3111, thereby further facilitating the high-precision positioning of the circuit structure 3. [Third realization] Referring to Figures 12 to 16, a third embodiment of the present invention is provided, which is similar to the first and second embodiments of the present invention. For the sake of brevity, descriptions of the same components from the first to the third embodiments of the present invention will be omitted here, and the following description will only disclose the features that differ between the first and third embodiments. In the present embodiment, each of the through holes 3111 has an elongated shape with a substantially identical width, the front positioning slots 123a are formed in the arrangement zone 121, and the support 31 has a plurality of radial notches 313 recessed from its outer edge towards the central axis L. Furthermore, the structure of the front positioning slot 123a and the connection relationship between the front positioning slot 123a and the circuit structure 3 are similar to those disclosed in the first embodiment shown in Figure 1 and Figure 9, and are omitted here for brevity. Specifically, in the top view of contact lens 100, the area of ​​the through-holes 3111 arranged in the first quadrant Q1 and the second quadrant Q2 may be greater than the area of ​​the through-holes 3111 arranged in the third quadrant Q3 and the fourth quadrant Q4. Furthermore, the area of ​​the through-holes 3111 represents between 1% and 85% (for example, preferably between 10% and 40%) of the area bounded by the outer contour of the C-shaped segment 311. Furthermore, any two of the adjacent through holes 3111 may be provided with one of the front positioning slots 123a between them, and the through holes 3111 include a plurality of first through holes 3111a and a plurality of second through holes 3111b. The first through holes 3111a are located on the inner side of the second through holes 3111b. In other words, the radius of each of the second through holes 3111b is different from (for example, greater than) the radius of each of the first through holes 3111a. In the present embodiment, each of the first through holes 3111a is arched with the center of the circle located on the central axis L, and the first through holes 3111a are spaced apart from each other. Each of the second through holes 3111b is arched with the center of the circle located on the central axis L, and the second through holes 3111b are spaced apart from each other. Specifically, in the top view of contact lens 100, a split between any two adjacent first through holes 3111a has one of the front positioning slots 123a, and the split between any two adjacent first through holes 3111a and a split (not having the front positioning slot 123a) between any two adjacent second through holes 3111b are not arranged in the same radial direction of contact lens 100, thus facilitating high-precision positioning of circuit structure 3. [Beneficial effects of the achievements] In conclusion, the contact lens of the present invention is provided with a free curved surface arranged on the front surface of the lens body, such that the thickness of the disposition area does not need to be based entirely on (or equal to) the thickness of the lower eyelid area to reduce the thickness of the disposition area (e.g., the thickness of the annular contact portion gradually increases towards the lower eyelid area). Consequently, the oxygen permeability of the contact area can be effectively increased, and the foreign body sensation of the contact lens can be reduced (or improved). Furthermore, the contact lens of the present invention is provided with at least one through-hole formed in the C-shaped segment and having a specific area (e.g., the area of ​​the at least one through-hole 3111 is from 1% to 85% of the area enclosed by an outer contour of the C-shaped segment 311), thereby effectively reducing wrinkling or stress concentration in the support, and further increasing the oxygen permeability of the contact lens by cooperating with the free curved surface. Furthermore, in the contact lens described in the present invention, the annular contact part is designed to have positioning slots to facilitate high-precision positioning of the circuit structure and electronic component in the contact lens manufacturing process, so that the contact lens can have high conformity in mass production. Specifically, the positioning slots can be controlled within a specific range (e.g., the sum of the areas of the positioning slot openings is less than or equal to 1% of the sum of the front and back surface areas), thus preventing any impact on the contact lens's resistance. Furthermore, part of the circuit structure is exposed through the corresponding positioning slot to enhance the circuit structure's heat dissipation efficiency. The foregoing description of exemplary embodiments of the invention is provided for illustrative and descriptive purposes only and is not intended to be exhaustive or to limit the invention to the exact forms disclosed. In light of the foregoing, numerous modifications and variations are possible. The embodiments have been selected and described to explain the principles of the invention and their practical application, so that other people skilled in the art may use the invention and its various embodiments, with modifications appropriate to the specific intended use. Alternative embodiments will be obvious to those skilled in the art to which the present invention relates, without departing from the scope of the claims.

Claims

1. Contact lens (100), characterized by comprising: a lens body (1) including an optical part (11) and an annular contact part (12) surrounding the optical part (11), wherein the annular contact part (12) has a C-shaped disposition zone (121) and a lower eyelid zone (122) disposed between two ends of the disposition zone (121),and the lens body (1) includes: a rear surface (1b) having a predetermined curvature for placement in an eye (200); and a front surface (1a) disposed opposite the rear surface (1b); an electronic component (2) integrated into the lower eyelid area (122) of the contact ring portion (12); and a circuit structure (3) integrated into the contact ring portion (12) and connected to the electronic component (2) to establish an electrical connection between them; wherein the contact ring portion (12) has a plurality of positioning grooves (123) recessed from at least one of the front surface (1a) and the rear surface (1b) into the circuit structure (3), and the underside of each of the positioning grooves (123) includes a portion of the circuit structure (3),so as to allow the circuit structure portion (3) to be exposed to the external environment; wherein the sum of the areas of the positioning slot openings (123) is less than or equal to 1% of the sum of the areas of the front surface (1a) and the rear surface (1b), and the contact annular portion (12) has a maximum thickness (Tmax) located in a portion of the contact annular portion (12) that corresponds in position with the electronic component (2), and has a minimum thickness (Tmin) located in a portion of the arrangement zone (121) away from the lower eyelid zone (122); wherein, when the circuit structure (3) and the electronic component (2) are arranged in a forming mold to form the lens body (1),The positioning grooves (123) are configured to allow the forming mold positioning structures to abut against the circuit structure portion (3) in order to position the circuit structure (3) and the electronic component (2) in a predetermined position; wherein the positioning grooves (123) include a plurality of front positioning grooves (123a) recessed into the front surface (1a), and wherein the depth of each of the front positioning grooves (123a) is within a range of 50 µm to 100 µm,and each of the front positioning slots (123a) has: a first bottom surface (1231) including the portion of the circuit structure (3) exposed to the external environment; a first raised surface (1232) connecting the front surface (1a) and the first bottom surface (1231); a second bottom surface (1233) separated from the front surface (1a) by a distance greater than the distance between the first bottom surface (1231) and the front surface (1a); and a second raised surface (1234) connecting the first bottom surface (1231) and the second bottom surface (1233) and disposed on one side of the circuit structure (3) or on one side of the electronic component (2).

2. Contact lens (100), according to claim 1,wherein the circuit structure (3) includes a support (31) and a circuit (32) formed on the support (31) and fully integrated into the lens body (1).

3. Contact lens (100) according to claim 1, wherein the first bottom surface (1231) of one of the front positioning grooves (123a) located in the lower eyelid area (122) contains a portion of the electronic component (2), so as to allow the portion of the electronic component (2) to be exposed to the external environment.

4. Contact lens (100), according to claim 1, wherein the circuit structure (3) has a plurality of through holes (3111) filled with the lens body (1), and wherein the optical part (11) defines a central axis (L), and wherein, in the top view of the contact lens (100), the central axis (L) defines a point of origin; the contact lens (100) is sequentially divided into a first quadrant (Q1),a second quadrant (Q2), a third quadrant (Q3), and a fourth quadrant (Q4) in a counterclockwise direction with respect to the origin point; the lower eyelid area (122) is disposed in the third quadrant (Q3) and in the fourth quadrant (Q4), and the through holes (3111) are disposed in the first quadrant (Q1), the second quadrant (Q2), the third quadrant (Q3), and the fourth quadrant (Q4).

5. Contact lens (100), according to claim 4, wherein, in the top view of the contact lens (100), a central angle (122) of the lower eyelid area (122) with respect to the origin point is within a range of between 30 degrees and 180 degrees.

6. Contact lens (100), according to claim 4, wherein, in the top view of the contact lens (100), four portions of the through-holes (3111) are arranged respectively in the first quadrant (Q1), the second quadrant (Q2),the third quadrant (Q3) and the fourth quadrant (Q4), respectively, and the area of ​​any of the four through-hole portions (3111) is from 50% to 150% of the area of ​​another of the four through-hole portions (3111).

7. Contact lens (100), according to claim 1, wherein the circuit structure (3) has a plurality of through-holes (3111) filled with the lens body (1), and wherein the circuit structure (3) includes: a support (31) having a C-shaped segment (311) integrated into the arrangement zone (121) and a connecting segment (312) integrated into the lower eyelid zone (122), wherein the connecting segment (312) is connected between two distal ends of the C-shaped segment (311); and a circuit formed on the support (31) and connected to the electronic component (2),wherein the circuit (32) has a plurality of closed loops; wherein the through-holes (3111) are formed in the C-shaped segment (311) and are respectively arranged in the closed loops.

8. Contact lens (100), according to claim 7, wherein the through-holes (3111) include at least a first through-hole (3111a) and at least a second through-hole (3111b), and each of the at least one first through-hole (3111a) and the at least one second through-hole (3111b) has an arcuate shape, the center of which of the circle lies on a central axis (L) defined by the optical part (11), and wherein the radius of the at least one second through-hole (3111b) is different from the radius of the at least one first through-hole (3111a).

9. Contact lens (100), according to claim 1, wherein the positioning slots (123) further include,a plurality of rear positioning slots (123b) recessed into the rear surface (1b), and the rear positioning slots (123b) and any of the front positioning slots (123a) do not correspond to the same part of the circuit structure (3).

10. A contact lens (100) according to claim 1, wherein the positioning grooves (123) include a plurality of rear positioning grooves (123b) recessed in the rear surface (1b), and the depth of each rear positioning groove (123b) is within the range of 50 µm to 100 µm, and wherein, in a top view of the contact lens (100), at least one of the rear positioning grooves (123b) extends along a radial direction of the lens body (1) and through the circuit structure (3).

11. A contact lens (100) according to claim 1,wherein the front surface (1a) has a visible surface (11a) whose position corresponds to the optical part (11) and a free curved surface (12a) whose position corresponds to the contact ring part (12), and wherein the visible surface (11a) has a first curvature different from a second curvature of the free curved surface (12a), and the thickness of the contact ring part (12) gradually increases towards the electronic component (2), and wherein the circuit structure (3) includes: a support (31) having a C-shaped segment (311) integrated into the arrangement area (121) and a connection segment (312) integrated into the lower eyelid area (122), wherein the connection segment (312) is connected between two distal ends of the C-shaped segment (311),and the support (31) has a fixed curvature different from the second curvature; and a circuit formed on the support (31) and connected to the electronic component (2); 12. Contact lens (100), according to claim 1, wherein the front surface (1a) has a visible surface (11a) whose position corresponds to the optical part (11) and a free curved surface (12a) whose position corresponds to the annular contact part (12), and wherein the visible surface (11a) has a first curvature different from a second curvature of the free curved surface (12a), and the thickness of the annular contact part (12) gradually increases towards the electronic component (2), and wherein the circuit structure (3) in the lower eyelid area (122) is separated from the rear surface (1b) by a first distance (D122),and the circuit structure (3) in the arrangement zone (121) is separated from the rear surface (1b) by a second distance (D121) which is less than the first distance (D122).

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